Malicious PDF — malware analysis report

Static analysis result for SHA-256 565dc3abd03bdd12…

MALICIOUS

PDF

69.6 KB Created: 2021-03-23 06:16:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 293232c88d8acf6701d361042f716d2c SHA-1: d181358687069f0692c75a4eb866e4165d6e920d SHA-256: 565dc3abd03bdd12a8de4e07b32461a1ac743679480f37ad0024e1b72b77ff05
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains a large number of external links, suggesting a link farm or phishing attempt. The embedded URLs, such as 'https://zajinet.ru/aws?utm_term=how+to+pair+polk+soundbar+to+tv', are likely used to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristics point towards a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://zajinet.ru/aws?utm_term=how+to+pair+polk+soundbar+to+tv
    • http://plafond.xyz/nietzsche_twilight_of_the_idols_gutenberg12cmz.pdf
    • http://winoorama.space/11919418477jmvvc.pdf
    • https://dipabuxirakilat.weebly.com/uploads/1/3/1/0/131071076/domurezenaza.pdf
    • https://cdn-cms.f-static.net/uploads/4385880/normal_602afdc3a0300.pdf
    • https://cdn-cms.f-static.net/uploads/4379615/normal_6030d7297ccb8.pdf
    • http://salleapp.xyz/a_court_of_thorns_and_roses_book_1_age_ratingl8o50.pdf
    • https://zuxaminuxux.weebly.com/uploads/1/3/4/6/134652083/f705a137012.pdf
    • http://openchambre.xyz/xupazupipazewerel3ffi.pdf
    • https://static.s123-cdn-static.com/uploads/4484636/normal_5fe251dc30548.pdf
    • https://taxefijiduru.weebly.com/uploads/1/3/5/3/135311915/xotarunane.pdf
    • http://ig-soft-team.com/24878611728184my.pdf
    • https://wafanipo.weebly.com/uploads/1/3/2/6/132695839/653608.pdf
    • http://ru-en.xyz/gadolowokuvidupuseludosufelg2.pdf
    • http://gooddevice-online.com/uefa_benchmarking_report_2017yabrt.pdf
    • https://jiromozuno.weebly.com/uploads/1/3/5/3/135387519/zepiwofogod_fubepelisa_gawelarex.pdf
    • http://study-english-05.site/shiitake_mushroom_nutritional_informationit54c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dowadotiju/teaching_approaches_strategies_and_techniques.pdf
    • https://4f6c49ad-35c2-4e1b-a50e-a4ca4816ee30.filesusr.com/ugd/a28dad_a0fdc74356ad4079b5ecc8d0f0f7ed35.pdf?index=true
    • https://s3.amazonaws.com/jokotaziweluge/90124587479.pdf
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_499fc9ca6e8b42ae88bbb6b27d9e2e85.pdf?index=true
    • https://s3.amazonaws.com/wukara/54050302926.pdf
    • https://s3.amazonaws.com/juduk/xakaxupavixa.pdf
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_c17f7355fe2744c38750830f5457fdd1.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d20c.bin
4e8a71573037949078206ea089a16035e4dd3d2a8f5fe0e04c2816d74ab81a14		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD20C 5272 bytes
font_01_sfnt_off0000e40f.bin
aa17399c232033935da467a702584128d64fbef82d96ea0b89202fa18598ca82		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE40F 10892 bytes

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